An automatic loading and unloading verification device for pressure instruments

Abstract

The present invention discloses an automatic loading and unloading verification device for pressure instruments, which relates to the technical field of pressure instrument verification. The present invention includes a main body of the automatic verification device. A verification table is fixed on the top of the main body of the automatic verification device. A loading and unloading device is arranged on one side of the top of the main body of the automatic verification device. The loading and unloading device includes two H-shaped telescopic frames. The fixed ends of the two H-shaped telescopic frames are fixed on the top of the main body of the automatic verification device. A notch plate is fixed on the top of the telescopic ends of the two H-shaped telescopic frames. Through the setting of the loading and unloading device, the notch plate, the driving component, the power connection component, the moving plate, the first elastic telescopic rod, the positioning rod, and the fixing plate cooperate to drive the air inlet end of the pressure transmitter to insert into or pull out from the air pressure joint of the verification table, thereby completing the loading and unloading process of the pressure transmitter, and further quickly completing the verification task of the pressure transmitter, so as to improve work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure instrument calibration, and specifically provides an automatic loading and unloading calibration device for pressure instruments. Background Art

[0002] A pressure instrument calibration device is a device used to verify and calibrate the accuracy of pressure instruments. By simulating different pressure values, the device can test the measurement accuracy of pressure instruments to ensure that accurate pressure readings are provided during use. The device can be adjusted and calibrated as needed and is widely used in industrial production, laboratories, quality control and other fields.

[0003] Chinese Patent with the patent publication number CN215726540U discloses a diaphragm pressure transmitter and a pressure gauge calibration device. The calibration device includes a flange disc. An oval through-hole I is provided on the surface of the flange disc. At one end of the oval through-hole I, the bottom end of an outer fixing rod is fixed to the surface of the flange disc, and the upper end of the outer fixing rod is sleeved with a strip-shaped pressing plate. Oval through-holes II and III are respectively provided on the surface of the strip-shaped pressing plate. A fixing nut is connected to the end of the outer fixing rod. A central rod is provided in the oval through-hole III. The upper end of the central rod is threadedly connected with a screw rod, and the lower end passes through the oval through-hole I. A lower fixing nut is connected to the central rod. Concentric grooves I, II, and III are provided on the surface of the flange disc. A pressure guiding groove is provided at the center position on the surface of the flange disc. The beneficial effect of this patent is that it can be used to connect the bottom flange discs of various diameter ranges of the instruments to be calibrated, with good sealing performance and reliable fixing.

[0004] However, the current calibration device has the following problems: When calibrating a pressure instrument, this calibration device generally requires manual disassembly and assembly of the pressure instrument, which takes a lot of time for the staff and thus affects the calibration efficiency of the pressure instrument. Therefore, we propose an automatic loading and unloading calibration device for pressure instruments. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides an automatic loading and unloading calibration device for pressure instruments, which solves the problems raised in the above background art.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: An automatic loading and unloading verification device for a pressure instrument, including a main body of the automatic verification device, a verification table is fixed on the top of the main body of the automatic verification device, a loading and unloading device is arranged on one side of the top of the main body of the automatic verification device, the loading and unloading device includes two H-shaped telescopic frames, the fixed ends of the two H-shaped telescopic frames are fixed on the top of the main body of the automatic verification device, the top of the telescopic ends of the two H-shaped telescopic frames is fixed with a notch plate, one side of the inner wall of the notch of the notch plate is semicircularly arranged, and the semicircle of the notch of the notch plate is concentric with the air pressure joint of the verification table, a card slot is opened inside the notch plate, two fixing plates are fixed on the rear side of the notch plate, a positioning rod penetrates through and is slidably installed on the top of the two fixing plates, and a spring is arranged between the positioning rod and the fixing plate, a driving component is arranged on the top of the main body of the automatic verification device, the driving component includes an adjusting screw rod and a threaded block, the adjusting screw rod is rotatably installed on the top of the main body of the automatic verification device through a bracket, and the adjusting screw rod is driven by a motor, the threaded block is threadedly connected to the outside of the adjusting screw rod, and the threaded block is slidably installed on the top of the main body of the automatic verification device, the threaded block is the mobile end of the driving component, a moving plate is fixed to the mobile end of the driving component, two first elastic telescopic rods are hinged to the front side of the moving plate, and the ends of the two first elastic telescopic rods away from the moving plate are respectively hinged to the rear sides of the bottoms of the two positioning rods, an electricity connection component is arranged on the top of the front side of the moving plate, the electricity connection component includes a bidirectional screw rod, two contact rods and two screw blocks, a strip-shaped groove is opened on the front side of the moving plate, the bidirectional screw rod is rotatably installed inside the strip-shaped groove of the moving plate, the two screw blocks are respectively threadedly connected to the two outer sides of the bidirectional screw rod, and the two screw blocks are both slidably installed inside the strip-shaped groove of the moving plate, the two contact rods are respectively fixed to the front sides of the two screw blocks, and the two contact rods are electrically connected to the main body of the automatic verification device. Place the pressure transmitter at the notch of the notch plate, and move the connection nut at the bottom of the pressure transmitter into the card slot. Drive the adjusting screw rod to rotate through the motor, the adjusting screw rod drives the threaded block to move towards the notch plate, the threaded block drives the moving plate to move accordingly, the moving plate drives the contact rods to contact the positive and negative poles of the pressure transmitter, and during the movement of the moving plate, the moving plate will push the first elastic telescopic rod to drive the positioning rod to move downward, the positioning rod pulls the fixing plate through the spring to drive the notch plate to move downward, the notch plate squeezes the telescopic end of the H-shaped telescopic frame, and the notch plate drives the air inlet end of the pressure transmitter to be inserted into the air pressure joint of the verification table. Then start the main body of the automatic verification device to verify the pressure transmitter.

[0007] According to the above technical solution, the loading and unloading device includes two through-hole blocks, two push rods, two rubber arc plates, and two elastic telescopic rods II. The two through-hole blocks are respectively fixed on both sides of the bottom of the notch plate. The two push rods are respectively slidably installed inside the two through-hole blocks. The two rubber arc plates are respectively fixed on one side of the two push rods close to each other. One end of each of the two elastic telescopic rods II is respectively hinged on one side of the two push rods away from each other. The other end of each of the two elastic telescopic rods II is respectively hinged on the top of the fixed-end cross bar of the H-shaped telescopic frame. The two rubber arc plates are respectively located on both sides of the bottom of the notch of the notch plate. When the notch plate moves downward and squeezes the telescopic end of the H-shaped telescopic frame, the cross bar of the H-shaped telescopic frame will push the elastic telescopic rod II to drive the push rod to move along the through-hole block towards the center of the notch plate. The push rod pushes the rubber arc plate to move accordingly until the two rubber arc plates are closely attached to the outer wall of the air inlet end of the pressure transmitter and the air pressure joint of the calibration table.

[0008] According to the above technical solution, a straightening device is provided on the top of the notch plate. The straightening device includes a U-shaped push frame. The U-shaped push frame is slidably installed on the top of the notch plate. A connecting column is fixed on the rear side of the U-shaped push frame and passes through the moving plate. A tension spring is provided between the U-shaped push frame and the moving plate. Each time the moving plate moves towards the notch plate, the moving plate pushes the tension spring to drive the U-shaped push frame to move along the top of the notch plate towards the pressure transmitter, and the U-shaped push frame will push the pressure transmitter placed at the notch plate flat.

[0009] According to the above technical solution, a receiving cavity is opened on one side of the card slot close to the U-shaped push frame. A U-shaped connecting plate is fixed on the bottom of the side of the U-shaped push frame away from the center of the automatic calibration device main body. An elastic telescopic plate is fixed on the side of the U-shaped connecting plate close to the center of the automatic calibration device main body. Both the U-shaped connecting plate and the elastic telescopic plate are located inside the receiving cavity of the card slot. The telescopic end of the elastic telescopic plate is provided with an inclined surface on the side close to the notch of the notch plate. When the U-shaped push frame moves along the top of the notch plate towards the pressure transmitter, the U-shaped push frame drives the elastic telescopic plate to move accordingly through the U-shaped connecting plate. The inclined surface of the telescopic end of the elastic telescopic plate will first come into contact with the outer wall of the connecting nut at the bottom of the pressure transmitter. Then, the connecting nut of the pressure transmitter will abut against the inclined surface of the telescopic end of the elastic telescopic plate to drive the telescopic end of the elastic telescopic plate to contract until the flat surface of the telescopic end of the elastic telescopic plate abuts against the connecting nut of the pressure transmitter. Under the elastic force of the elastic telescopic plate, the telescopic end of the elastic telescopic plate will press the pressure transmitter at the notch of the notch plate.

[0010] The present invention provides an automatic loading, unloading and calibration device for pressure instruments. It has the following beneficial effects:

[0011] (1) Through the setting of the loading and unloading device, the invention enables the intake end of the pressure transmitter to be inserted into or pulled out of the air pressure joint of the calibration table by the cooperation of the notch plate, the driving component, the power connection component, the moving plate, the first elastic telescopic rod, the positioning rod, and the fixing plate, thus completing the loading and unloading process of the pressure transmitter, and further quickly completing the calibration task of the pressure transmitter, thereby improving work efficiency.

[0012] (2) Through the cooperation of the notch plate, the H-shaped telescopic frame, the second elastic telescopic rod, the push rod, and the through-hole block, the invention enables the two rubber arc plates to closely adhere to the outer walls of the intake end of the pressure transmitter and the air pressure joint of the calibration table. The rubber arc plates can form an effective seal between the intake end of the pressure transmitter and the air pressure joint of the calibration table, preventing gas leakage during transmission, ensuring the stability and accuracy of air pressure during the calibration process of the pressure transmitter, which is crucial for calibration and verification, and avoiding pressure errors caused by leakage.

[0013] (3) Through the setting of the straightening device, the invention enables the moving plate, the notch plate, and the tension spring to cooperate to drive the U-shaped push frame to flatten the pressure transmitter placed at the notch plate, thereby ensuring that the subsequent contact rod can accurately access the positive and negative poles of the pressure transmitter, avoiding problems such as poor contact or contact error between the contact rod and the positive and negative poles of the pressure transmitter caused by the asymmetric position of the pressure transmitter; at the same time, the U-shaped push frame, the notch plate, the U-shaped connecting plate, and the elastic telescopic plate cooperate, enabling the telescopic end of the elastic telescopic plate to press the pressure transmitter at the notch of the notch plate, thereby ensuring that the pressure transmitter is in a stable position throughout the calibration process and avoiding displacement of the pressure transmitter during the calibration process, which affects the calibration. Description of the Drawings

[0014] Figure 1 Schematic diagram of the whole of the present invention Figure 1 ;

[0015] Figure 2 Schematic diagram of the whole of the present invention Figure 2 ;

[0016] Figure 3 Schematic diagram of the loading and unloading device of the present invention Figure 1 ;

[0017] Figure 4 Of the present invention Figure 3 Enlarged schematic diagram of the structure at A;

[0018] Figure 5 Schematic diagram of the loading and unloading device of the present invention Figure 2 ;

[0019] Figure 6 Partial structural schematic diagram of the loading and unloading device of the present invention;

[0020] Figure 7Schematic diagram of the straightening device of the present invention.

[0021] In the figure: 1. Automatic verification device main body; 2. Verification table; 3. Loading and unloading device; 31. H-shaped telescopic frame; 32. Notch plate; 33. Card slot; 34. Driving assembly; 341. Adjusting screw; 342. Threaded block; 35. Moving plate; 36. First elastic telescopic rod; 37. Positioning rod; 38. Fixed plate; 39. Bi-directional screw; 310. Contact rod; 311. Screw block; 312. Through-port block; 313. Push rod; 314. Rubber arc plate; 315. Second elastic telescopic rod; 4. Straightening device; 41. U-shaped pushing frame; 42. Connecting column; 43. Tension spring; 44. U-shaped connecting plate; 45. Elastic telescopic plate. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] Please refer to Figure 1 - Figure 7 , an embodiment of the present invention is: a pressure gauge automatic loading and unloading verification device, including an automatic verification device main body 1, a verification table 2 is fixed on the top of the automatic verification device main body 1, and a loading and unloading device 3 is arranged on one side of the top of the automatic verification device main body 1. The loading and unloading device 3 includes two H-shaped telescopic frames 31. The fixed ends of the two H-shaped telescopic frames 31 are fixed on the top of the automatic verification device main body 1. The top of the telescopic ends of the two H-shaped telescopic frames 31 is fixed with a notch plate 32. One side of the inner wall of the notch of the notch plate 32 is semicircularly arranged, and the semicircle of the notch of the notch plate 32 is concentric with the air pressure joint of the verification table 2. A card slot 33 is opened on the inner side of the notch plate 32, and two fixed plates 38 are fixed on the rear side of the notch plate 32 (as Figure 5As shown in the figure, a positioning rod 37 penetrates through and is slidably installed at the top of two fixed plates 38, and a spring is provided between the positioning rod 37 and the fixed plate 38. A driving assembly 34 is arranged at the top of the automatic calibration device main body 1. The driving assembly 34 includes an adjusting screw 341 and a threaded block 342. The adjusting screw 341 is rotatably installed at the top of the automatic calibration device main body 1 through a bracket, and the adjusting screw 341 is driven by a motor. The threaded block 342 is threadedly connected to the outside of the adjusting screw 341, and the threaded block 342 is slidably installed at the top of the automatic calibration device main body 1. The threaded block 342 is the moving end of the driving assembly 34. A moving plate 35 is fixed to the moving end of the driving assembly 34. Two elastic telescopic rods 36 are hinged to the front side of the moving plate 35. One ends of the two elastic telescopic rods 36 away from the moving plate 35 are respectively hinged to the rear sides of the bottoms of the two positioning rods 37. A power connection assembly is arranged at the top of the front side of the moving plate 35. The power connection assembly includes a bidirectional screw 39, two contact rods 310, and two screw blocks 311. A strip-shaped groove is formed in the front side of the moving plate 35. The bidirectional screw 39 is rotatably installed inside the strip-shaped groove of the moving plate 35. The two screw blocks 311 are respectively threadedly connected to the two outer sides of the bidirectional screw 39, and the two screw blocks 311 are both slidably installed inside the strip-shaped groove of the moving plate 35. The two contact rods 310 are respectively fixed to the front sides of the two screw blocks 311. The two contact rods 310 are electrically connected to the automatic calibration device main body 1. Through the setting of the above structure, the notch plate 32 drives the air inlet end of the pressure transmitter to insert into or pull out from the air pressure joint of the calibration table 2, thereby completing the loading and unloading process of the pressure transmitter, and then the calibration task of the pressure transmitter can be quickly completed, thus improving work efficiency.

[0024] The loading and unloading device 3 includes two through-hole blocks 312, two push rods 313, two rubber arc plates 314, and two elastic telescopic rods 315. The two through-hole blocks 312 are respectively fixed to the two sides of the bottom of the notch plate 32. The two push rods 313 are respectively slidably installed inside the two through-hole blocks 312. The two rubber arc plates 314 are respectively fixed to the sides of the two push rods 313 close to each other. One ends of the two elastic telescopic rods 315 are respectively hinged to the sides of the two push rods 313 away from each other. The other ends of the two elastic telescopic rods 315 are respectively hinged to the top of the fixed cross-bar of the H-shaped telescopic frame 31. The two rubber arc plates 314 are respectively located on both sides of the bottom of the notch of the notch plate 32. Through the setting of the above structure, the two rubber arc plates 314 are closely attached to the outer walls of the air inlet end of the pressure transmitter and the air pressure joint of the calibration table 2. The rubber arc plate 314 can form an effective seal between the air inlet end of the pressure transmitter and the air pressure joint of the calibration table 2, preventing gas leakage during transmission, ensuring the stability and accuracy of air pressure during the calibration process of the pressure transmitter, which is crucial for calibration and verification, and avoiding pressure errors caused by leakage.

[0025] During use, open the rear cover of the pressure transmitter. The positive and negative electrodes of the pressure transmitter are no longer blocked by the rear cover. Then, place the pressure transmitter at the notch of the notch plate 32, and move the connecting nut at the bottom of the pressure transmitter into the card slot 33. Drive the adjusting screw 341 to rotate through the motor. The adjusting screw 341 drives the threaded block 342 to move towards the notch plate 32. The threaded block 342 drives the moving plate 35 to move accordingly. The moving plate 35 drives the contact rod 310 to contact the positive and negative electrodes of the pressure transmitter. And during the movement of the moving plate 35, the moving plate 35 will push the first elastic telescopic rod 36 to drive the positioning rod 37 to move downward. The positioning rod 37 drives the fixing plate 38 to move downward through the spring, driving the notch plate 32 to move downward. The notch plate 32 squeezes the telescopic end of the H-shaped telescopic frame 31. And the notch plate 32 drives the air inlet end of the pressure transmitter to be inserted into the air pressure joint of the calibration table 2. Then start the main body 1 of the automatic calibration device to calibrate the pressure transmitter. When it is necessary to disassemble the pressure transmitter, the adjusting screw 341 drives the threaded block 342 to move away from the notch plate 32. The threaded block 342 drives the moving plate 35 to move accordingly. The moving plate 35 drives the contact rod 310 to separate from the positive and negative electrodes of the pressure transmitter. At the same time, the moving plate 35 will pull the first elastic telescopic rod 36 to drive the positioning rod 37 to move upward. The positioning rod 37 drives the fixing plate 38 to move upward through the spring, driving the notch plate 32 to move upward. The notch plate 32 drives the air inlet end of the pressure transmitter to be pulled out of the air pressure joint of the calibration table 2. The loading and unloading device 3 is used to complete the loading and unloading process of the pressure transmitter, which can quickly complete the calibration task of the pressure transmitter, thereby improving work efficiency. When the notch plate 32 moves downward and squeezes the telescopic end of the H-shaped telescopic frame 31, the horizontal support rod of the H-shaped telescopic frame 31 will push the second elastic telescopic rod 315 to drive the push rod 313 to move along the through-hole block 312 towards the center of the notch plate 32. The push rod 313 drives the rubber arc plate 314 to move accordingly until the two rubber arc plates 314 are closely attached to the outer walls of the air inlet end of the pressure transmitter and the air pressure joint of the calibration table 2. The rubber arc plate 314 can form an effective seal between the air inlet end of the pressure transmitter and the air pressure joint of the calibration table 2, preventing gas leakage during transmission, ensuring the stability and accuracy of air pressure during the calibration process of the pressure transmitter, which is crucial for calibration and verification, and avoiding pressure errors caused by leakage.

[0026] It should be noted that the distance between the two contact rods 310 can be adjusted by rotating the bidirectional screw 39 to drive the screw block 311, so that the contact rod 310 can be changed according to the requirements of the positive and negative electrodes of different models of pressure transmitters.

[0027] It should also be noted that each time the moving plate 35 pushes the first elastic telescopic rod 36 to drive the positioning rod 37 to move downward, the positioning rod 37 pulls the fixed plate 38 through the spring to drive the notch plate 32 to move downward. After the intake end of the pressure transmitter is driven by the notch plate 32 to be inserted into the air pressure connector of the calibration table 2, when the moving plate 35 continues to push the first elastic telescopic rod 36 to move, the moving plate 35 will drive the corresponding spring to continue to apply a downward pulling force on the fixed plate 38, so as to ensure the stability of the intake end of the pressure transmitter driven by the notch plate 32 to be inserted into the air pressure connector of the calibration table 2.

[0028] Please refer to Figure 1 - Figure 7 , based on the above embodiment, in another embodiment of the present invention, a straightening device 4 is provided at the top of the notch plate 32.

[0029] The straightening device 4 includes a U-shaped push frame 41. The U-shaped push frame 41 is slidably installed at the top of the notch plate 32. A connecting column 42 is fixed to the rear side of the U-shaped push frame 41, and the connecting column 42 penetrates through the moving plate 35. A tension spring 43 is provided between the U-shaped push frame 41 and the moving plate 35. Through the above structural arrangement, the U-shaped push frame 41 will push the pressure transmitter placed at the notch plate 32 flat, so as to ensure that the subsequent contact rod 310 can accurately access the positive and negative poles of the pressure transmitter, avoiding the problems of poor contact or contact error between the contact rod 310 and the positive and negative poles of the pressure transmitter caused by the asymmetric position of the pressure transmitter.

[0030] A receiving cavity is formed on one side of the card slot 33 close to the U-shaped push frame 41. A U-shaped connecting plate 44 is fixed to the bottom of the side of the U-shaped push frame 41 away from the center of the automatic calibration device main body 1. An elastic telescopic plate 45 is fixed to the side of the U-shaped connecting plate 44 close to the center of the automatic calibration device main body 1. Both the U-shaped connecting plate 44 and the elastic telescopic plate 45 are located inside the receiving cavity of the card slot 33. The telescopic end of the elastic telescopic plate 45 is provided with an inclined surface on the side close to the notch of the notch plate 32. Through the above structural arrangement, the telescopic end of the elastic telescopic plate 45 will press the pressure transmitter at the notch of the notch plate 32, so as to ensure that the pressure transmitter is in a stable position during the entire calibration process, avoiding the problem that the displacement of the pressure transmitter during the calibration process affects the calibration.

[0031] During use, each time the moving plate 35 moves towards the notch plate 32, the moving plate 35 pushes the tension spring 43 to drive the U-shaped push frame 41 to move along the top of the notch plate 32 towards the pressure transmitter. The U-shaped push frame 41 will flatten the pressure transmitter placed at the notch plate 32, thereby ensuring that the subsequent contact rod 310 can accurately access the positive and negative poles of the pressure transmitter, avoiding problems such as poor contact or contact error between the contact rod 310 and the positive and negative poles of the pressure transmitter caused by the asymmetric position of the pressure transmitter; when the U-shaped push frame 41 moves along the top of the notch plate 32 towards the pressure transmitter, the U-shaped push frame 41 drives the elastic telescopic plate 45 to move along through the U-shaped connecting plate 44. The inclined surface of the telescopic end of the elastic telescopic plate 45 will first contact the outer wall of the connecting nut at the bottom of the pressure transmitter. Then, the connecting nut of the pressure transmitter will press against the inclined surface of the telescopic end of the elastic telescopic plate 45 to drive the telescopic end of the elastic telescopic plate 45 to contract until the flat surface of the telescopic end of the elastic telescopic plate 45 abuts against the connecting nut of the pressure transmitter. Under the elastic force of the elastic telescopic plate 45, the telescopic end of the elastic telescopic plate 45 will press the pressure transmitter at the notch of the notch plate 32, thereby ensuring that the pressure transmitter is in a stable position throughout the calibration process and avoiding the problem that the displacement of the pressure transmitter during the calibration process affects the calibration.

[0032] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A pressure instrument automatic loading and unloading calibration device, comprising an automatic calibration device body (1), characterized in that: A calibration platform (2) is fixed on the top of the main body (1) of the automatic calibration device. A loading and unloading device (3) is arranged on one side of the top of the main body (1) of the automatic calibration device. The loading and unloading device (3) comprises two H-shaped telescopic frames (31). The fixed ends of the two H-shaped telescopic frames (31) are fixed on the top of the main body (1) of the automatic calibration device. A notch plate (32) is fixed on the top of the telescopic ends of the two H-shaped telescopic frames (31). A card slot (33) is provided on the inner side of the notch plate (32). Two fixing plates (38) are fixed on the rear side of the notch plate (32). A positioning rod (37) is penetrated and slidably installed on the top of the plate (38), and a spring is provided between the positioning rod (37) and the fixed plate (38). A driving assembly (34) is provided on the top of the main body (1) of the automatic inspection device, and a moving plate (35) is fixed to the moving end of the driving assembly (34). The front side of the moving plate (35) is hinged with two elastic telescopic rods (36), and the ends of the two elastic telescopic rods (36) away from the moving plate (35) are respectively hinged to the bottom rear sides of the two positioning rods (37), and a power connection assembly is provided on the front top of the moving plate (35); The power connection assembly comprises a bidirectional screw (39), two contact rods (310), and two screw blocks (311); a strip groove is provided on the front side of the movable plate (35); the bidirectional screw (39) is rotatably mounted inside the strip groove of the movable plate (35); the two screw blocks (311) are respectively threadedly connected to two sides of the outside of the bidirectional screw (39); the two screw blocks (311) are both slidably mounted inside the strip groove of the movable plate (35); and the two contact rods (310) are respectively fixed on the front sides of the two screw blocks (311); The loading and unloading device (3) comprises two through-hole blocks (312), two push rods (313), two rubber arc plates (314), and two elastic telescopic rods (315); the two through-hole blocks (312) are respectively fixed on both sides of the bottom of the notch plate (32); the two push rods (313) are respectively slidably mounted inside the two through-hole blocks (312); the two rubber arc plates (314) are respectively fixed on the sides of the two push rods (313) that are close to each other; one end of the two elastic telescopic rods (315) are respectively hinged on the sides of the two push rods (313) that are away from each other; and the other ends of the two elastic telescopic rods (315) are respectively hinged on the top of the fixed end cross support rod of the H-shaped telescopic frame (31); A straightening device (4) is provided on the top of the notch plate (32), and the straightening device (4) comprises a U-shaped push frame (41), the U-shaped push frame (41) is slidably mounted on the top of the notch plate (32), a connecting column (42) is fixed to the rear side of the U-shaped push frame (41), and the connecting column (42) passes through the movable plate (35), and a tension spring (43) is provided between the U-shaped push frame (41) and the movable plate (35).

2. The automatic loading and unloading calibration device for pressure instruments according to claim 1 is characterized in that: The driving assembly (34) comprises an adjusting screw (341) and a threaded block (342); the adjusting screw (341) is rotatably mounted on the top of the automatic calibration device body (1) via a bracket, and the adjusting screw (341) is driven by a motor; the threaded block (342) is threadedly connected to the outside of the adjusting screw (341), and the threaded block (342) is slidably mounted on the top of the automatic calibration device body (1); the threaded block (342) is the movable end of the driving assembly (34).

3. The automatic loading and unloading calibration device for pressure instruments according to claim 1 is characterized in that: The two contact rods (310) are electrically connected to the automatic testing device body (1).

4. The automatic loading and unloading calibration device for pressure instruments according to claim 1 is characterized in that: One side of the inner wall of the notch of the notch plate (32) is arranged in a semicircular shape, and the semicircular shape of the notch of the notch plate (32) is arranged concentrically with the air pressure joint of the calibration platform (2).

5. The automatic loading and unloading calibration device for pressure instruments according to claim 1 is characterized in that: The two rubber arc plates (314) are respectively located on two sides of the bottom of the notch of the notch plate (32).

6. The automatic assembly and disassembly calibration device for pressure instruments according to claim 1 is characterized in that: A receiving cavity is provided on a side of the card slot (33) close to the U-shaped push frame (41); a U-shaped connecting plate (44) is fixed to the bottom of a side of the U-shaped push frame (41) away from the center of the automatic calibration device body (1); an elastic telescopic plate (45) is fixed to a side of the U-shaped connecting plate (44) close to the center of the automatic calibration device body (1); and both the U-shaped connecting plate (44) and the elastic telescopic plate (45) are located inside the receiving cavity of the card slot (33).

7. The automatic assembly and disassembly calibration device for pressure instruments according to claim 6, characterized in that: The telescopic end of the elastic telescopic plate (45) is provided with an inclined surface on one side close to the notch of the notch plate (32).

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